/* * Copyright © 2004 Keith Packard * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name of Keith Packard not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. Keith Packard makes no * representations about the suitability of this software for any purpose. It * is provided "as is" without express or implied warranty. * * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ #ifdef HAVE_DIX_CONFIG_H #include <dix-config.h> #endif #include "renderedge.h" /* * Compute the smallest value no less than y which is on a * grid row */ _X_EXPORT xFixed RenderSampleCeilY (xFixed y, int n) { return pixman_sample_ceil_y (y, n); } #define _div(a,b) ((a) >= 0 ? (a) / (b) : -((-(a) + (b) - 1) / (b))) /* * Compute the largest value no greater than y which is on a * grid row */ _X_EXPORT xFixed RenderSampleFloorY (xFixed y, int n) { return pixman_sample_floor_y (y, n); } /* * Step an edge by any amount (including negative values) */ _X_EXPORT void RenderEdgeStep (RenderEdge *e, int n) { pixman_edge_step (e, n); } /* * Initialize one edge structure given the line endpoints and a * starting y value */ _X_EXPORT void RenderEdgeInit (RenderEdge *e, int n, xFixed y_start, xFixed x_top, xFixed y_top, xFixed x_bot, xFixed y_bot) { pixman_edge_init (e, n, y_start, x_top, y_top, x_bot, y_bot); } /* * Initialize one edge structure given a line, starting y value * and a pixel offset for the line */ _X_EXPORT void RenderLineFixedEdgeInit (RenderEdge *e, int n, xFixed y, xLineFixed *line, int x_off, int y_off) { pixman_line_fixed_edge_init (e, n, y, (pixman_line_fixed_t *)line, x_off, y_off); }